Composition comprising a thiopyridinone compound, a hydrophilic gelling agent, a poly(propylene oxide)-poly(ethylene oxide) block polymer and a filler

Abstract

The present invention relates to a composition, preferably a cosmetic composition, comprising at least one compound selected from the compounds of formula (I) below, tautomers of formula (I'), salts thereof, solvates thereof, such as hydrates thereof, optical isomers thereof, racemates thereof, and mixtures thereof, at least one hydrophilic gelling agent, at least one poly(propylene oxide)-poly(ethylene oxide) block polymer, and at least one filler. The present invention also relates to a non-therapeutic cosmetic treatment process for caring for keratin materials and to a non-therapeutic cosmetic use of said composition.

Description

[0001] Description

[0002] Composition comprising a thiopyridinone compound, a hydrophilic gelling agent, a polypropylene oxide)-poly(ethylene oxide) block polymer and a filler

[0003] The present invention relates to the field of caring for keratin materials, in particular of skin care.

[0004] At various periods in their life, some people see the appearance on their skin, and more in particular on the face and hands, of darker and / or more coloured spots, which give the skin heterogeneity. These spots are due in particular to a high concentration of melanin in the keratinocytes located on the surface of the skin.

[0005] The use of harmless topical depigmenting substances with good efficacy is particularly sought for the purpose of treating pigment spots.

[0006] For example, arbutin, niacinamide and kojic acid are known as skin depigmenting agents.

[0007] Furthermore, W02012 / 080075 and WO2017 / 102349 reveal a novel depigmenting or bleaching agent which is a thiopyridinone compound. The thiopyridinone compound has depigmenting or bleaching properties which are particularly effective in reducing melanin production.

[0008] However, it has been discovered that the incorporation of a thiopyridinone compound in a composition comprising one or more gelling agents and one or more fillers tends to destabilize the composition over time, leading to problems of flocculation and / or sedimentation of this (these) filler(s) in the composition.

[0009] In addition, it is advantageous to have a composition exhibiting good sensory properties when applied to keratin materials, preferably the skin.

[0010] Summary of the invention

[0011] Thus, one subject of the present invention is a composition, preferably a cosmetic composition, comprising: at least one compound selected from the compounds of formula (I) below, tautomers of formula (I’) below, salts thereof, solvates thereof, such as hydrates thereof, optical isomers thereof, racemates thereof, and mixtures thereof: in which,

[0012] - Ri denotes a radical selected from a) a hydrogen atom, and b) a saturated, linear C1-C10 or branched C3-C10 alkyl group optionally substituted with one or more groups, which may be identical or different, selected from i) -O-R3, and ii) -S-R3, and

[0013] - R2 denotes a radical selected from a) a hydrogen atom, b) a saturated, linear C1-C12 or branched C3-C12 or cyclic C3-C8 hydrocarbon group optionally substituted with one or more groups, which may be identical or different, selected from i) -O-R3, ii) -S-R3, iii) -C(O)-O-R3, and iv) a C5-C12 aryl group, optionally substituted with one or more hydroxyls and / or with one or more C1- Cs alkoxy radicals, and c) a C5-C12 aryl group, optionally substituted with one or more hydroxyls and / or with one or more Ci-Cs alkoxy radicals, and

[0014] - R3 denotes a radical selected from a) a hydrogen atom, and b) a saturated, linear C1-C10 or branched C3-C10 alkyl group; at least one hydrophilic gelling agent; at least one polypropylene oxide)-poly(ethylene oxide) block polymer; at least one filler.

[0015] According to another of its subjects, the present invention also relates to a non-therapeutic cosmetic treatment process for caring for keratin materials, in particular for depigmenting, lightening and / or bleaching keratin materials, comprising a step of applying a composition, preferably a cosmetic composition, as described above, to keratin materials, preferably the skin.

[0016] Another subject of the present invention is the non-therapeutic cosmetic use of a composition, preferably a cosmetic composition, as described above for caring for keratin materials, in particular for bleaching, lightening and / or depigmenting keratin materials.

[0017] Definitions The term "physiologically acceptable medium" is understood to mean a medium compatible with the keratin materials of a human being.

[0018] The term "keratin materials" is understood to mean the skin of the body or of the face, the lips, the mucous membranes, the eyelashes, the nails, and the hair, of a human being.

[0019] The term “skin” is understood to mean all of the skin of the body and the scalp of a human being and preferably the skin of the face, neckline, neck, arms and forearms, and hands, or even more preferably still the skin of the face (in particular of the forehead, nose, cheeks, lips and chin), neckline and neck.

[0020] For the purposes of the present invention, the term "porous particles" is understood to mean particles having a structure comprising pores or interstices. The structure of the particles may be of matrix type like a sponge. The porosity of the particles is characterized quantitatively by their specific surface area.

[0021] For the purposes of the present invention, the term “hydrophilic gelling agent” is understood to mean a substance that has the ability to absorb a large quantity of water to form a gel. More precisely, it is a hydrocompatible polymer that creates a three-dimensional network in water, thus trapping the liquid and giving the solution a gelled consistency. Their hydrophilic nature comes from the presence of polar functional groups, such as hydroxyls (-OH), carboxyls (- COOH), or amines (-NH2), which interact strongly with water molecules through hydrogen bonds. It is this interaction that allows the gelling agent to disperse or dissolve in water.

[0022] Detailed description of the invention

[0023] One subject of the present invention is the cosmetic use of at least one thiopyridinone compound of formula (I) or (I’), salts thereof, solvates thereof, such as hydrates thereof, optical isomers thereof, racemates thereof, and / or mixtures thereof, or of a composition comprising same, for improving the barrier function of the skin.

[0024] Thiopyridinone compound

[0025] The composition according to the present invention comprises at least one thiopyridinone compound. Two or more distinct thiopyridinone compounds of formula (I) or (I’) may be used in combination. Thus, a single thiopyridinone compound of formula (I) or (I’) or a combination of different thiopyridinone compounds of formula (I) or (I’) may be used.

[0026] The thiopyridinone compound(s) are selected from the compounds of formula (I) below, tautomers of formula (I’) below, salts thereof, solvates thereof, such as hydrates thereof, optical isomers thereof, racemates thereof, and mixtures thereof: in which:

[0027] Ri denotes a radical selected from a) a hydrogen atom, and b) a saturated, linear C1-C10 or branched C3-C10 alkyl group optionally substituted with one or more groups, which may be identical or different, selected from i) -O-R3, and ii) -S-R3, and

[0028] R2 denotes a radical selected from a) a hydrogen atom, b) a saturated, linear C1-C12 or branched C3-C12 or cyclic C3-C8 hydrocarbon group optionally substituted with one or more groups, which may be identical or different, selected from i) -O-R3, ii) -S-R3, iii) -C(O)-O-R3, and iv) a C5-C12 aryl group, optionally substituted with one or more hydroxyls and / or with one or more Ci-Cs alkoxy radicals, and c) a C5-C12 aryl group, optionally substituted with one or more hydroxyls and / or with one or more Ci-Cs alkoxy radicals, and

[0029] R3 denotes a radical selected from a) a hydrogen atom, and b) a saturated, linear C1-C10 or branched C3-C10 alkyl group.

[0030] Below, for the purposes of the present invention and unless otherwise indicated: a "saturated, linear C1-C12 or branched C3-C12 hydrocarbon group" is equivalent to a "linear (C1-C12) or branched (C3-C12) alkyl group" which corresponds to a saturated, linear C1-C12 or branched C3-C12 hydrocarbon group, preferably a linear C1-C10 or branched C3-C10 hydrocarbon group, and more preferably a linear Ci-Ce or branched C3-C6 hydrocarbon group; preferentially, the linear or branched groups may be chosen from methyl, ethyl, propyl, isopropyl, butyl, isobutyl and tert-butyl, pentyl, hexyl, heptyl, octyl, nonyl and decyl groups; more preferentially, the saturated, linear or branched alkyl groups may be chosen from methyl, ethyl, propyl, isopropyl, butyl, isobutyl and tert-butyl, pentyl, hexyl, heptyl and octyl groups, such as methyl, ethyl, n-pentyl, n-nonyl and isobutyl groups; a saturated "cyclic Cs-Cs" hydrocarbon group is a monocyclic or bicyclic cycloalkyl group containing from 3 to 8 carbon atoms, and in particular is a monocyclic C5 to C7 cycloalkyl group such as a cyclohexyl group, an "alkoxy radical" is an alkyl-oxy radical for which the alkyl radical is a linear or branched C1-C16 hydrocarbon radical, and preferentially a Ci-Cs hydrocarbon radical; when the alkoxy group is optionally substituted, this implies that the alkyl group is optionally substituted as defined above; an "aryl" group represents a monocyclic or fused or non-fused bicyclic carbonbased group comprising from 5 to 12 carbon atoms, preferably from 6 to 10 carbon atoms, and wherein at least one ring is aromatic; preferentially, the aryl radical is a phenyl, biphenyl or naphthyl group, more preferably a phenyl group; the expression "at least one" is equivalent to the expression "one or more"; and the term "inclusive" for a concentration range means that the limits of that range are within the defined range.

[0031] The salts of the compounds of formula (I), (I’), (II) or (II’) as defined below comprise the conventional non-toxic salts of said compounds, such as those formed from an organic or inorganic acid or from an organic or inorganic base.

[0032] As salts of the compounds of formula (I), (I’), (II) or (II’), mention may be made of: the salts obtained by addition of the compound of formula (I) or (II) to: a mineral base, such as sodium hydroxide, potassium hydroxide, calcium hydroxide, ammonium hydroxide, magnesium hydroxide, lithium hydroxide, or sodium, potassium or calcium carbonate or hydrogen carbonate, for example; or an organic base such as a primary, secondary or tertiary alkylamine, for example triethylamine or butylamine. This primary, secondary or tertiary alkylamine may comprise one or more nitrogen and / or oxygen atoms and may thus comprise, for example, one or more alcohol functions. Mention may be made in particular of 2-amino-2-methylpropanol, ethanolamine, triethanolamine, 2-dimethylaminopropanol, 2-amino-2-(hydroxymethyl)-1 ,3-propanediol and 3-(dimethylamino)propylamine.

[0033] Mention may also be made of the salts of amino acids, for example lysine, arginine, guanidine, glutamic acid and aspartic acid. Advantageously, the salts of the compounds of formula (I) or (II) (when they comprise a carboxyl group) may be chosen from alkali metal or alkaline-earth metal salts such as sodium, potassium, calcium or magnesium salts and ammonium salts.

[0034] An "organic or inorganic acid salt" is more particularly chosen from salts chosen from among a salt derived from i) hydrochloric acid HCI, ii) hydrobromic acid HBr, iii) sulfuric acid H2SO4, iv) alkylsulfonic acids: Alk-S(O)2OH such as methanesulfonic acid and ethanesulfonic acid; v) arylsulfonic acids: Ar-S(O)2OH such as benzenesulfonic acid and toluenesulfonic acid; vi) citric acid; vii) succinic acid; viii) tartaric acid; ix) lactic acid; x) alkoxysulfinic acids: Alk-O-S(O)OH, such as methoxysulfinic acid and ethoxysulfinic acid; xi) aryloxysulfinic acids, such as tolueneoxysulfinic acid and phenoxysulfinic acid; xii) phosphoric acid H3PO4; xiii) acetic acid CH3C(O)OH; xiv) triflic acid CF3SO3H; and xv) tetrafluoroboric acid HBF4.

[0035] The acceptable solvates of the compounds described in the specification comprise conventional solvates such as those formed during the preparation of said compounds owing to the presence of solvents. Examples that may be mentioned include solvates due to the presence of water or of linear or branched alcohols, such as ethanol or isopropanol.

[0036] The optical isomers are in particular enantiomers and diastereoisomers.

[0037] Compound (I’) is the tautomeric form of compound (I) when a tautomeric equilibrium exists according to the following scheme:

[0038] According to one embodiment of the present invention, R1 represents a hydrogen atom.

[0039] According to one embodiment of the present invention, R1 of formulae (I) and (I’) represents a linear (C1-C10) or branched (C3-C10) alkyl group, in particular a linear (Ci-Ce) or branched (C3- Ce) alkyl group, such as methyl, ethyl, n-pentyl, n-nonyl, isobutyl, more preferably ethyl. In particular, said alkyl group of R1 is not substituted.

[0040] According to one embodiment of the present invention, R2represents a hydrogen atom.

[0041] According to one embodiment of the present invention, R2represents a linear (C1-C10) or branched (C3-C10) alkyl group, in particular a linear (Ci-Ce) or branched (Cs-Ce) alkyl group, such as methyl, ethyl, n-pentyl, n-nonyl, isobutyl, more preferably methyl or ethyl; said alkyl group of R2not being substituted.

[0042] According to one embodiment of the present invention, R2of formulae (I) and (I’) represents a linear (C1-C10) or branched (C3-C10) alkyl group, in particular a linear (Ci-Ce) or branched (C3- Ce) alkyl group, such as methyl, ethyl, n-pentyl, n-nonyl, isobutyl, more preferably methyl or ethyl; said alkyl group being substituted with one or more groups selected from i), ii), iii) and iv) as defined above. Preferably, said alkyl group is substituted with one or two groups selected from i), ii) and iii), more preferably with one or two groups selected from i) and iii), better still substituted with one group iii) such as carboxy.

[0043] Another variant for the radical R2 is that said alkyl group is substituted with a group iv), in particular substituted with a phenyl group.

[0044] According to another embodiment of the present invention, R2 represents a (Ca-Cs) cycloalkyl group, preferably a (C5-C7) cycloalkyl group such as cyclohexyl.

[0045] According to another embodiment of the present invention, R2 represents a C5-C12 aryl group optionally substituted with one or more hydroxyls and / or with one or more Ci-Cs alkoxy radicals, preferably a phenyl group, in particular which is not substituted.

[0046] According to one embodiment, R3 represents a hydrogen atom.

[0047] According to another embodiment, R3 represents a saturated, linear C1-C10 or branched C3- C10 alkyl group; in particular a linear (Ci-Ce) or branched (Cs-Ce) alkyl group, preferably a (Ci- 04) alkyl group such as the methyl group.

[0048] Preferably, the compounds of formula (I) and the tautomer (I’) or salts thereof, optical isomers, racemates and / or solvates thereof, such as hydrates thereof and derivatives thereof, alone or as a mixture, have the following meanings:

[0049] R1 denotes a radical selected from a) a hydrogen atom, and b) a saturated, linear Ci-Ce or branched C3-C6 alkyl group optionally substituted with one or more groups, which may be identical or different, selected from i) -O-R3, and ii) -S-R3, preferably optionally substituted with one or more groups i);

[0050] R2 denotes a radical selected from a) a hydrogen atom; b) a saturated, linear C1-C10 or branched C3-C10 or cyclic C3-C8 , such as Cs-Ce, hydrocarbon group optionally substituted with one or more groups, which may be identical or different, selected from i) -O-R3, ii) -S-R3, iii) - C(O)-O-R3, and iv) a phenyl group, optionally substituted with one or more hydroxyls and / or with one or more C1-C4 alkoxy radicals such as methoxy, preferably substituted with one or more groups selected from i) and iii), preferably iii) such as carboxy; and

[0051] R3 denotes a radical selected from a) a hydrogen atom, and b) a saturated, linear Ci-Ce or branched C3-C6 alkyl group.

[0052] Preferentially, the compounds of formula (I) and the tautomer (I’) or salts thereof, optical isomers and racemates thereof and / or solvates thereof, such as hydrates thereof, alone or as a mixture, have the following meanings: Ri denotes a radical selected from a) a hydrogen atom, and b) a saturated, linear C1-C4 or branched C3-C4 alkyl group optionally substituted with one or more groups, which may be identical or different, selected from i) -OR3, more preferably not being substituted;

[0053] R2 denotes a radical selected from a) a hydrogen atom, and b) a saturated, linear C1-C10 or branched C3-C10 or cyclic C3-C8 , for instance Cs-Ce, hydrocarbon group optionally substituted with one or more groups, which may be identical or different, selected from i) -O-R3, iii) -C(O)- O-R3, and iv) a C5-C12 aryl group, optionally substituted with one or more hydroxyls and / or with one or more C1-C4 alkoxy radicals; and

[0054] R3 denotes a radical selected from a) a hydrogen atom, and b) a saturated, linear C1-C4 or branched C3-C4 alkyl group, such as methyl or ethyl.

[0055] Preferentially, the compounds of formula (I) and the tautomer (I’) or salts thereof, optical isomers, racemates and / or solvates thereof, such as hydrates and derivatives thereof, alone or as a mixture, have the following meanings:

[0056] R1 is a hydrogen atom; and

[0057] R2denotes a radical selected from a) a hydrogen atom, and b) a saturated, linear C1-C5 or branched C3-C5 or cyclic C3-C8 , such as Cs-Ce, hydrocarbon group optionally substituted with one or more groups, which may be identical or different, selected from iii) -C(O)-O-R3; R2 is more preferably still a saturated, linear C1-C4 or branched C3-C4 hydrocarbon group substituted with a group iii) -C(O)-OR3; and

[0058] R3 denotes a radical selected from a) a hydrogen atom, and b) a saturated, linear C1-C4 or branched C3-C4 alkyl group, such as methyl or ethyl.

[0059] According to another preferred embodiment, the compounds of formula (I) and the tautomer (I’) are selected from the compounds of formula (II) below and also the tautomers thereof of formula (II’) below, the salts thereof, the solvates thereof and the optical isomers thereof, and the racemates thereof, alone or as a mixture:

[0060] Table 1 n formulae (II) and (II’), R1 and R3 have the same meaning as R1 and R3 for the compounds of formulae (I) and (I’), and X denotes an alkylene radical -(CH2)n- with n being an integer ranging inclusively from 1 to 10, preferably ranging from 1 to 6, more preferably ranging from 1 to 4, such as 1 , preferably R3 represents a hydrogen atom.

[0061] Among the compounds of formula (I), the following compounds are preferably used, and the tautomer (I1) thereof or salts thereof, optical isomers, racemates, and / or solvates thereof, such as hydrates and derivatives thereof, alone or as a mixture:

[0062] Table 2

[0063] Among these compounds, the following compounds are more particularly preferred:

[0064] Table 3

[0065]

[0066] preferred:

[0067] Table 4 particularly preferred:

[0068] Table 5

[0069] All the above compounds can be obtained by a chemical process known to those skilled in the art, from commercially available reagents.

[0070] The thiopyridinone compound (1) may be prepared in accordance with the process described, for example, in document EP-A-3390363 or WO 2017 / 102349, which is incorporated by reference.

[0071] The thiopyridinone compound (1) may be an active principle or an active compound in cosmetic or dermatological products. The term "active" principle or compound used herein denotes an ingredient or a compound which has an active cosmetic or dermatological property, such as antioxidant, bleaching, UV-screening and antibacterial effects. The thiopyridinone compound (1) used in the present invention can function as a depigmenting, decolourizing or bleaching agent, and thus the composition according to the present invention can be used as a bleaching product or as a cosmetic composition for bleaching a keratin material.

[0072] The thiopyridinone compound (1) can be used as an agent for depigmenting, decolourizing or bleaching the skin, body hair, eyelashes or hair, and also the lips and / or nails, and preferably the skin, in particular to remove pigmentation spots or age spots, and / or as an anti-tanning agent.

[0073] The amount of thiopyridinone compound(s) (1) in the composition according to the present invention may be 0.01 % by weight or more, preferably 0.05% by weight or more, and more preferably 0.1% by weight or more, relative to the total weight of the composition. Furthermore, the amount of thiopyridinone compound(s) (1) in the composition according to the present invention may be 10% by weight or less, preferably 5% by weight or less, and more preferably 3% by weight or less, relative to the total weight of the composition.

[0074] The amount of thiopyridinone compound(s) (1) in the composition according to the present invention may range from 0.01 % to 10% by weight, preferably from 0.05% to 5% by weight, more preferably from 0.1 % to 3% by weight, relative to the total weight of the composition.

[0075] Hydrophilic gelling agent

[0076] The composition according to the invention comprises at least one hydrophilic gelling agent. It may preferably comprise a mixture of several hydrophilic gelling agents.

[0077] Said hydrophilic gelling agent is different from the polypropylene oxide)-poly(ethylene oxide) block polymer used in the context of the present invention.

[0078] Advantageously, the composition according to the invention comprises at least one hydrophilic gelling agent chosen from polymers bearing a sulfonic group, polysaccharides, and mixtures thereof.

[0079] The hydrophilic gelling agent(s) may be present in the composition according to the invention in a content ranging from 0.01 % to 5%, and preferably from 0.1% to 3% and even more preferentially from 0.1 % to 1 % by weight of hydrophilic gelling agent relative to the total weight of said composition.

[0080] A - Polymer bearing a sulfonic group

[0081] The term "polymer bearing a sulfonic group" means a poly(2-acrylamido-2- methylpropanesulfonic acid) polymer, salts thereof and mixtures thereof, preferably a homopolymer or copolymer of a monomer bearing a sulfonic group, salts thereof and mixtures thereof.

[0082] These are water-soluble, water-dispersible or water-swellable polymers. The polymers used in accordance with the invention are homopolymers or copolymers that can be obtained from at least one ethylenically unsaturated monomer bearing a sulfonic group, which may be in free form or in partially or completely neutralized form.

[0083] Preferably, the polymers bearing a sulfonic group which are used in accordance with the invention can be partially or completely neutralized with a mineral base (such as sodium hydroxide, potassium hydroxide or aqueous ammonia) or an organic base such as mono-, di- or triethanolamine, an aminomethylpropanediol, N-methylglucamine or basic amino acids, such as arginine and lysine, or mixtures of these compounds. They are generally neutralized. In the present invention, the term "neutralized" is intended to denote polymers which have been completely or almost completely neutralized, that is to say at least 90% neutralized.

[0084] The polymers bearing a sulfonic group which are used in the composition of the invention generally have a number-average molecular mass ranging from 1000 to 20 000 000 g / mol, preferably ranging from 20 000 to 5 000 000 and even more preferentially from 100 000 to 1 500 000 g / mol.

[0085] The monomers bearing a sulfonic group of the polymer used in the composition of the invention are in particular chosen from vinylsulfonic acid, styrenesulfonic acid, (meth)acrylamido(Ci-C22)alkylsulfonic acids, N-(Ci-C22)alkyl(meth)acrylamido(Ci- C22)alkylsulfonic acids such as undecylacrylamidomethanesulfonic acid, and also the partially or completely neutralized forms thereof, and mixtures thereof.

[0086] According to a preferred embodiment of the invention, the monomers bearing a sulfonic group are chosen from (meth)acrylamido(Ci-C22)alkylsulfonic acids, for instance acrylamidomethanesulfonic acid, acrylamidoethanesulfonic acid, acrylamidopropanesulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid, 2-methacrylamido-2-methylpropanesulfonic acid, 2-acrylamido-n-butanesulfonic acid, 2-acrylamido-2,4,4-trimethylpentanesulfonic acid, 2-methacrylamidododecylsulfonic acid and 2-acrylamido-2,6-dimethyl-3-heptanesulfonic acid, and also the partially or completely neutralized forms thereof, and mixtures thereof.

[0087] These polymers according to the invention may be crosslinked or non-crosslinked.

[0088] When the polymers are crosslinked, the crosslinking agents can be chosen from the polyolefinically unsaturated compounds commonly used for the crosslinking of the polymers obtained by radical polymerization.

[0089] As crosslinking agents, mention may be made, for example, of divinylbenzene, diallyl ether, dipropylene glycol diallyl ether, polyglycol diallyl ether, triethylene glycol divinyl ether, hydroquinone diallyl ether, ethylene glycol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, trimethylolpropane triacrylate, methylenebisacrylamide, methylenebismethacrylamide, triallylamine, triallyl cyanurate, diallyl maleate, tetraallylethylenediamine, tetraallyloxyethane, trimethylolpropane diallyl ether, allyl (meth)acrylate, allyl ethers of alcohols and allyl esters of phosphoric acid derivatives and / or vinylphosphonic acid derivatives, or mixtures of these compounds. According to one preferred embodiment of the invention, the crosslinking agent is chosen from methylenebisacrylamide, allyl methacrylate or trimethylolpropane triacrylate (TMPTA).

[0090] The degree of crosslinking generally varies from 0.01 to 10 mol%, and more particularly from 0.2 to 2 mol%, relative to the polymer. Preferably, the polymer bearing a sulfonic group is chosen from homopolymers and copolymers of 2-acrylamido-2-methylpropanesulfonic acid, the salts thereof and mixtures thereof. Even more preferably, the polymer bearing a sulfonic group is chosen from homopolymers of 2-acrylamido-2-methylpropanesulfonic acid, the salts thereof and mixtures thereof.

[0091] The 2-acrylamido-2-methylpropanesulfonic acid homopolymers more particularly preferred comprise, randomly distributed, units of general formula (II) below: in which X+denotes a proton, an alkali metal cation, an alkaline-earth metal cation or the ammonium ion, not more than 10 mol% of the cations X+being able to be protons H+; and crosslinking units originating from at least one monomer having at least two olefin double bonds.

[0092] The homopolymers used according to the invention and more particularly preferred comprise from 90% to 99.9% by weight and preferably from 98% to 99.5% by weight of units of formula (I), and from 0.01% to 10% by weight, preferably from 0.2% to 2% by weight of crosslinking units, the weight proportions being defined relative to the total weight of the polymer.

[0093] The preferred homopolymers of this type are chosen from the crosslinked or non-crosslinked polymers of sodium 2-acrylamido-2-methylpropanesulfonate, such as that used in the commercial product Simulgel 800 (CTFA name: Sodium Polyacryloyldimethyl Taurate), or crosslinked polymers of ammonium 2-acrylamido-2-methylpropanesulfonate (INCI name: AMMONIUM POLYACRYLDIMETHYLTAURAMIDE) such as the product sold under the trade name Hostacerin AMPS® by Clariant.

[0094] Preferred copolymers of 2-acrylamido-2-methylpropanesulfonic acid are selected from: copolymers of 2-acrylamido-2-methylpropanesulfonic acid and acrylamide, for example of Sepigel or Simulgel type sold in particular by SEPPIC. By way of nonlimiting examples of such copolymers, mention may be made, for example, of crosslinked anionic acrylamide / 2-acrylamido-2-methylpropanesulfonic acid copolymers, in the form of a W / O emulsion, such as those sold under the name Sepigel 305 (INCI name: polyacrylamide (and) C13-14 isoparaffin (and) laureth- 7) and under the name Simulgel 600 (INCI name: acrylamide / sodium acryloyldi methyltaurate copolymer (and) isohexadecane (and) polysorbate 80) by SEPPIC; copolymers of 2-acrylamido-2-methylpropanesulfonic acid and of vinylpyrrolidone or of vinylformamide, such as that used in the commercial product sold under the name Aristoflex AVC® by Clariant (CTFA name: Ammonium Acryloyldimethyltaurate / VP copolymer) but neutralized with sodium hydroxide or potassium hydroxide; copolymers of 2-acrylamido-2-methylpropanesulfonic acid and sodium acrylate, for instance the 2-acrylamido-2-methylpropanesulfonic acid / sodium acrylate copolymer such as that used in the commercial product sold under the name Simulgel EG® by SEPPIC or under the trade name Sepinov EM (CTFA name: Hydroxyethyl Acrylate / Sodium Acryloyldimethyl Taurate Copolymer); copolymers of 2-acrylamido-2-methylpropanesulfonic acid and hydroxyethyl acrylate, for instance the 2-acrylamido-2-methylpropanesulfonic acid / hydroxyethyl acrylate copolymer such as that used in the commercial product sold under the name Simulgel NS® by SEPPIC (CTFA name: Hydroxyethyl Acrylate / Sodium Acryloyldimethyl Taurate Copolymer (and) Squalane (and) Polysorbate 60), or such as the product sold under the name sodium acrylamido-2-methylpropanesulfonate / hydroxyethyl acrylate copolymer, such as the commercial product Sepinov EMT 10 (INCI name: Hydroxyethyl Acrylate / Sodium Acryloyldimethyl Taurate Copolymer); copolymers of 2-acrylamido-2-methylpropanesulfonic acid and ethoxylated cetearyl methacrylate, which are optionally crosslinked, such as Aristoflex® HMS, which bears the name 2-acrylamido-2-methylpropanesulfonic acid / ethoxylated cetearyl methacrylate copolymer (25 EO) 80 / 20, crosslinked with trimethylolpropane triacrylate (TMPTA) or else Ammonium Acryloyldimethyltaurate / Steareth-25 Methacrylate Crosspolymer as INCI name; and mixtures thereof.

[0095] In a particular embodiment, the composition according to the invention does not comprise copolymers of 2-acrylamido-2-methylpropanesulfonic acid such as copolymers of 2- acrylamido-2-methylpropanesulfonic acid and acrylamide, for instance crosslinked anionic acrylamide / 2-acrylamido-2-methylpropanesulfonic acid copolymers in the form of a W / O emulsion, such as that sold under the name Simulgel 600 (INCI name: acrylamide / sodium acryloyldimethyltaurate copolymer (and) isohexadecane (and) polysorbate 80) by SEPPIC.

[0096] Preferably, the polymer bearing a sulfonic group is a crosslinked homopolymer of ammonium 2-acrylamido-2-methylpropanesulfonate (INCI name: AMMONIUM

[0097] POLYACRYLDIMETHYLTAURAMIDE) such as the product sold under the trade name Hostacerin AMPS® by Clariant.

[0098] B - Polysaccharide

[0099] In general, the polysaccharides according to the invention may be chosen from polysaccharides produced by microorganisms; polysaccharides isolated from algae, and higher plant polysaccharides, such as homogeneous polysaccharides, in particular celluloses and derivatives thereof or fructosans, heterogeneous polysaccharides such as gum arabics, galactomannans, glucomannans and pectins, and derivatives thereof.

[0100] In particular, the polysaccharides may be chosen from fructans, gellans, glucans, amylose, amylopectin, glycogen, pullulan, dextrans, celluloses and derivatives thereof, in particular methylcelluloses, hydroxyalkylcelluloses, ethylhydroxyethylcelluloses and carboxymethylcelluloses, mannans, xylans, lignins, arabans, galactans, galacturonans, alginate-based compounds, chitin, chitosans, glucuronoxylans, arabinoxylans, xyloglucans, glucomannans, pectic acids and pectins, arabinogalactans, carrageenans, agars, glycosaminoglucans, acacia gums, tragacanth gums, ghatti gums, karaya gums, locust bean gums, galactomannans such as guar gums and nonionic derivatives thereof, in particular hydroxypropyl guar, and ionic derivatives thereof, biopolysaccharide gums of microbial origin, in particular scleroglucan or xanthan gums, mucopolysaccharides, and in particular chondroitin sulfates, and mixtures thereof.

[0101] Advantageously, a composition according to the invention comprises, as hydrophilic gelling agent, at least one polysaccharide chosen from carrageenans, in particular kappa- carrageenan, gellan gum, agar-agar, xanthan gum, alginate-based compounds, in particular sodium alginate, scleroglucan gum, guar gum, inulin, pullulan, and mixtures thereof.

[0102] These polysaccharides may be chemically modified, notably with urea or urethane groups or by hydrolysis, oxidation, esterification, etherification, sulfatation, phosphatation, amination, amidation or alkylation reaction, or by several of these modifications.

[0103] The derivatives obtained may be anionic, cationic, amphoteric or nonionic.

[0104] Advantageously, the polysaccharides may be chosen from carrageenans, in particular kappa- carrageenan, gellan gum, agar-agar, xanthan gum, alginate-based compounds, in particular sodium alginate, scleroglucan gum, guar gum, inulin and pullulan, and mixtures thereof. In general, the compounds of this type that may be used in the present invention are chosen from those described especially in Kirk-Othmer’s Encyclopedia of Chemical Technology, Third Edition, 1982, volume 3, pp. 896-900, and volume 15, pp. 439-458, in Polymers in Nature by E.A. McGregor and C.T. Greenwood, published by John Wiley & Sons, Chapter 6, pp. 240- 328, 1980, in the book by Robert L. Davidson entitled Handbook of Water-Soluble Gums and Resins published by McGraw Hill Book Company (1980) and in Industrial Gums - Polysaccharides and their Derivatives, edited by Roy L. Whistler, Second Edition, published by Academic Press Inc.

[0105] According to a preferred embodiment, the polysaccharide is chosen from xanthan gum, alginate-based compounds, in particular sodium alginate, scleroglucan gum, guar gum, and mixtures thereof.

[0106] According to a preferred embodiment, the polysaccharide is xanthan gum.

[0107] Xanthan gums have a molecular weight of between 1 000 000 g / mol and 50 000 000 g / mol and a viscosity of between 0.6 and 1.65 Pa.s for an aqueous composition containing 1 % of xanthan gum (measured at 25°C on a Brookfield viscometer of LVT type at 60 rpm).

[0108] Xanthan gums are represented, for example, by the products sold under the names Rhodicare by Rhodia Chimie, under the name Satiaxane™ by Cargill Texturizing Solutions (for the food, cosmetic and pharmaceutical industries), under the name Novaxan™ by ADM, and under the names Kelzan® and Keltrol® by CP-Kelco.

[0109] In a preferred embodiment, the composition according to the invention comprises at least one hydrophilic gelling agent chosen from polymers bearing a sulfonic group, polysaccharides, and mixtures thereof.

[0110] In a preferred embodiment, the composition according to the invention comprises at least two hydrophilic gelling agents, the first being chosen from polymers bearing a sulfonic group and the second being chosen from polysaccharides. In this embodiment, even more preferably, the polymer(s) bearing a sulfonic group is (are) present in a content ranging from 0.005% to 4.5%, and preferably from 0.05% to 2.6%, and even more preferentially from 0.05% to 0.7% by weight relative to the total weight of said composition; and the polysaccharide(s) is (are) present in a content ranging from 0.005% to 0.5%, and preferably from 0.05% to 0.4%, and even more preferentially from 0.05% to 0.3% by weight relative to the total weight of said composition.

[0111] In a preferred embodiment, the composition according to the invention comprises at least one hydrophilic gelling agent chosen from a crosslinked homopolymer of ammonium 2-acrylamido- 2-methylpropanesulfonate, a xanthan gum, and mixtures thereof. In a preferred embodiment, the composition according to the invention comprises at least two hydrophilic gelling agents, the first being a crosslinked homopolymer of ammonium 2- acrylamido-2-methylpropanesulfonate and the second being a xanthan gum. In this embodiment, even more preferably, the crosslinked homopolymer of ammonium 2- acrylamido-2-methylpropanesulfonate is present in a content ranging from 0.005% to 4.5%, and preferably from 0.05% to 2.6%, and even more preferentially from 0.05% to 0.7% by weight relative to the total weight of said composition; and the xanthan gum is present in a content ranging from 0.005% to 0.5%, and preferably from 0.05% to 0.4%, and even more preferentially from 0.05% to 0.3% by weight relative to the total weight of said composition.

[0112] Polypropylene oxide)-poly(ethylene oxide) block polymer

[0113] Polypropylene oxide)-poly(ethylene oxide) block polymers, also referred to as propylene oxide / ethylene oxide copolymers or poloxamers or else EO / PO polycondensates, are copolymers consisting of polyethylene glycol and polypropylene glycol blocks. Preferably, the EO / PO polymer is chosen from polyethylene glycol / polypropylene glycol / polyethylene glycol triblock polymers, for example those having the following chemical structure:

[0114] H-(O-CH2-CH2)a-(O-CH(CH3)-CH2)b-(O-CH2-CH2)a-OH (III), wherein: a ranges from 2 to 150, and b ranges from 1 to 100; preferably a ranges from 10 to 130, and b ranges from 20 to 80.

[0115] The ethylene oxide / propylene oxide block polymer (polycondensate) preferably has a weightaverage molecular weight ranging from 1000 to 20 000, better still ranging from 1500 to 19 000, in particular ranging from 2000 to 18 000 and even better still ranging from 4000 to 17 000.

[0116] As block polymers, mention may in particular be made of the polyethylene glycol / polypropylene glycol / polyethylene glycol triblock polymer sold under the “Synperonic” names by Uniqema, such as the ethylene oxide / propylene oxide / ethylene oxide (13 EO / 30 PO / 13 EO) polymers (MW: 2900) sold under the name Synperonic PE / L 64 NAA LQ (Poloxamer 184), the ethylene oxide / propylene oxide / ethylene oxide (8 EO / 30 PO / 8 EO) polymers (MW: 2500) sold under the name Synperonic PE / L 62 (INCI name: Poloxamer 182), the ethylene oxide / propylene oxide / ethylene oxide (6 EO / 67 PO / 6 EO) polymers (MW: 4400) sold under the name Synperonic PE / L 121 (INCI name: Poloxamer 401), the ethylene oxide / propylene oxide / ethylene oxide (46 EO / 16 PO / 46 EO) polymers (MW: 5000) sold under the name Synperonic® PE / F38 (INCI name: Poloxamer 108), the ethylene oxide / propylene oxide / ethylene oxide (128 EO / 54 PO / 128 EO) polymers (MW: 14 000) sold under the name Synperonic® PE / F108 (INCI name: Poloxamer 338), the ethylene oxide / propylene oxide / ethylene oxide (11 EO / 21 PO / 11 EO) polymers (MW: 2200) sold under the name Synperonic® PE / L44 (INCI name: Poloxamer 124), the ethylene oxide / propylene oxide / ethylene oxide (5 EO / 21 PO / 5 EO) polymers (MW: 1630) sold under the name Synperonic® PE / L42 (INCI name: Poloxamer 122), the ethylene oxide / propylene oxide / ethylene oxide (98 EO / 67 PO / 98 EO) polymers (MW: 12 000) sold under the name Synperonic® PE / F127 (INCI name: Poloxamer 407), the ethylene oxide / propylene oxide / ethylene oxide (97 EO / 39 PO / 97 EO) polymers (MW: 10 800) sold under the name Synperonic® PE / F88 (INCI name: Poloxamer 238) and mixtures thereof.

[0117] Even more preferably, the polypropylene oxide)-poly(ethylene oxide) block polymer is the ethylene oxide / propylene oxide / ethylene oxide (128 EO / 54 PO / 128 EO) polymer (MW: 14000) sold under the name Synperonic® PE / F108 (INCI name: Poloxamer 338).

[0118] The polypropylene oxide)-poly(ethylene oxide) block polymer(s) may be present in the composition according to the invention in a content ranging from 0.05% to 2% by weight relative to the total weight of the composition, and preferably from 0.1 % to 1 % by weight, and even more particularly from 0.2% to 0.9% by weight.

[0119] Fillers

[0120] The composition according to the invention comprises at least one filler.

[0121] The compositions in accordance with the invention may also comprise at least one filler of organic or mineral nature.

[0122] The term “filler” should be understood as meaning colourless or white solid particles of any shape, which are in an insoluble form dispersed in the medium of the composition. These particles, of mineral or organic nature, make it possible to confer body or firmness on the composition and / or softness.

[0123] The fillers used in the compositions according to the present invention may be of lamellar, globular, spherical or fibrous forms or of any other form intermediate between these defined forms.

[0124] The fillers according to the invention may or may not be surface-coated, and in particular they may be surface-treated with silicones, amino acids, fluorinated derivatives or any other substance which promotes the dispersion and the compatibility of the filler in the composition.

[0125] The filler(s) may be present in the composition according to the invention in a content ranging from 0.1% to 20% by weight relative to the total weight of the composition, and preferably ranging from 1 % to 10% by weight, and even more preferentially ranging from 2% to 5% by weight relative to the total weight of the composition.

[0126] Mineral filler Examples of mineral fillers that may be mentioned include talc, mica, silica such as fumed silica and porous silica particles of spherical shape, kaolin, calcium carbonate, magnesium carbonate, hydroxyapatite, boron nitride, glass or ceramic microcapsules, or composites of silica and of titanium dioxide, for instance the TSG series sold by Nippon Sheet Glass.

[0127] A - Fumed silica

[0128] In particular, hydrophilic fumed silicas are obtained by continuous flame pyrolysis of silicon tetrachloride (SiCU) at 1000°C in the presence of hydrogen and oxygen. In particular, the hydrophilic fumed silicas thus obtained are finely divided.

[0129] More particularly, the hydrophilic fumed silica is chosen from hydrophilic fumed silicas having a specific surface area of from 30 to 500 m2 / g, a number-average particle size ranging from 30 to 50 nanometres and a density ranging from 40 to 200, better still from 50 to 150 g / l. The specific surface area can be characterized using the BET method.

[0130] Such silicas are sold under the name Aerosil by Degussa-Huls.

[0131] Use is more particularly made of hydrophilic fumed silicas having a specific surface area of between 180 and 350 m2 / g, a number-average particle size of between 10 and 20 nanometres and a density of between 50 and 150 g / l.

[0132] Such hydrophilic fumed silicas are sold under the name Aerosil 200 and Aerosil 300 by Degussa-Huls.

[0133] B - Porous silica particles of spherical shape

[0134] The porous silica particles of spherical shape have in particular a specific surface area of from 30 to 1000 m2 / g, more particularly from 100 to 900 m2 / g.

[0135] The specific surface area per unit mass may be determined by the nitrogen absorption method, known as the BET (Brunauer-Emmett-Teller) method, described in the Journal of the American Chemical Society, vol. 60, page 309, February 1938 and corresponding to international standard ISO 5794 / 1 (annex D). The BET specific surface area corresponds to the total specific surface area of the particles under consideration.

[0136] The sizes of the particles can be measured by static light scattering using a commercial particle size analyser such as the MasterSizer 2000 machine from Malvern. The data are processed on the basis of the Mie scattering theory. This theory is in particular described in the publication by Van de Hulst, H.C., Light Scattering by Small Particles, Chapters 9 and 10, Wiley, New York, 1957.

[0137] In particular, the porous silica particles of spherical shape used in the context of the present invention are porous silica microspheres. In particular, the silicas which can be used in the composition of the invention are amorphous.

[0138] In the present invention, the term "silicas of spherical shape" is intended to mean particles in the form or substantially in the form of a sphere, which are insoluble in the medium of the composition according to the invention, even at the melting point of the medium (about 100°C).

[0139] The volume mean diameter of the porous silica particles of spherical shape generally ranges from 0.1 pm (microns) to 40 pm (microns). It is preferably less than 30 pm and in particular less than 20 pm. More particularly, the volume mean diameter of the particles ranges from 1 pm to 20 pm. It can be assessed by electron microscopy measurements.

[0140] Preferably, the porous silica particles of spherical shape according to the invention have an oil absorption capacity, measured at the wet point, ranging from 25 g / 100 g to 350 g / 100 g, preferably from 50 to 150 g / 100 g and better still from 70 to 130 g / 100 g.

[0141] The absorption capacity measured at the wet point, denoted Wp, corresponds to the amount of oil which it is necessary to add to 100 g of particles in order to obtain a homogeneous paste.

[0142] It is measured according to the "wet point" method or the method for determining the oil uptake of a powder described in the standard NF T 30-022. It corresponds to the amount of oil adsorbed onto the available surface of the powder and / or absorbed by the powder by measuring the wet point, described below:

[0143] An amount m = 2 g of powder is placed on a glass plate and then the oil (oleic acid) is added dropwise. After addition of 4 to 5 drops of oil to the powder, mixing is performed using a spatula, and addition of oil is continued until conglomerates of oil and powder have formed. From this point, the oil is added one drop at a time and the mixture is then triturated with the spatula. The addition of oil is stopped when a firm, smooth paste is obtained. This paste must be able to be spread over the glass plate without cracks or the formation of lumps. The mass in g of oil used is then noted.

[0144] The oil uptake corresponds to the ratio of weight of oil (g) to weight of powder (g).

[0145] Preferably, the porous silica particles of spherical shape used in the present invention have an oil uptake and a water uptake that are similar to one another.

[0146] As an example of porous silica particles of spherical shape that can be used in the context of the present invention, mention may particularly be made of the following commercial products: Silica Beads SB-150, SB-300 or SB-700, preferentially SB-300, from Miyoshi Kasei; the range of the Sunsphere products from Asahi Glass AGC Si-Tech, in particular Sunsphere H-51 , Sunsphere H-33 or Sunsphere 12L, Sunsphere H-201 , H-52 and H-53; the range of the Solesphere products from Asahi Glass AGC Si-Tech, in particular Solesphere H-51 ; Sunsil 130 from Sunjin; Spherica P-1500 from Ikeda Corporation; Sylosphere from Fuji Silysia. Organic filler

[0147] Examples of organic fillers that may be mentioned include polyamide powders (Nylon® Orgasol from Atochem), polyethylene powders, polymethyl methacrylate powders, polytetrafluoroethylene (Teflon) powders, acrylic acid copolymer powders (Polytrap from the company Dow Corning), lauroyl lysine, hollow polymer microspheres such as those of polyvinylidene chloride / acrylonitrile, for instance Expancel (Nobel Industrie), hexamethylene diisocyanate / trimethylol hexyllactone copolymer powder (Plastic Powder from Toshiki), silicone resin microbeads (for example Tospearls from Toshiba), synthetic or natural micronized waxes, metal soaps derived from organic carboxylic acids containing from 8 to 22 carbon atoms and preferably from 12 to 18 carbon atoms, for example zinc stearate, magnesium stearate, lithium stearate, zinc laurate or magnesium myristate, Polypore L 200 (Chemdal Corporation), organopolysiloxane elastomers, powders of crosslinked polyurethane comprising a copolymer, said copolymer comprising trimethylol hexyllactone. It may in particular be a hexamethylene diisocyanate / trimethylol hexyllactone polymer. Such particles are especially commercially available, for example, under the name Plastic Powder D-400® or Plastic Powder D-800® from the company Toshiki, and mixtures thereof.

[0148] Organopolysiloxane elastomers

[0149] Among the organopolysiloxane elastomers, mention may be made of non-emulsifying organopolysiloxane elastomers.

[0150] The term non-emulsifying defines organopolysiloxane elastomers that do not contain a hydrophilic chain, and in particular do not contain polyoxyalkylene units (in particular polyoxyethylene or polyoxypropylene units) or polyglyceryl units.

[0151] Thus, the organopolysiloxane elastomer can be obtained by an addition-crosslinking reaction of diorganopolysiloxane containing at least one hydrogen bonded to silicon and of diorganopolysiloxane having ethylenically unsaturated groups bonded to silicon, notably in the presence of a platinum catalyst; or by a condensation-crosslinking-dehydrogenation reaction between a hydroxyl-terminated diorganopolysiloxane and a diorganopolysiloxane containing at least one hydrogen bonded to silicon, notably in the presence of an organotin compound; or by a condensation-crosslinking reaction of a hydroxyl-terminated diorganopolysiloxane and of a hydrolysable organopolysiloxane; or by thermal crosslinking of organopolysiloxane, notably in the presence of an organoperoxide catalyst; or by crosslinking of organopolysiloxane by high-energy radiation, such as gamma rays, ultraviolet rays or an electron beam.

[0152] Preferably, the organopolysiloxane elastomer is obtained by crosslinking addition reaction (A) of diorganopolysiloxane containing at least two hydrogens each bonded to a silicon, and (B) of diorganopolysiloxane containing at least two ethylenically unsaturated groups bonded to silicon, especially in the presence (C) of a platinum catalyst.

[0153] In particular, the organopolysiloxane elastomer may be obtained by reaction of dimethylvinylsiloxy-terminated dimethylpolysiloxane and of trimethylsiloxy-terminated methylhydropolysiloxane, in the presence of a platinum catalyst.

[0154] Compound (A) is the base reagent for the formation of elastomeric organopolysiloxane, and the crosslinking is performed by addition reaction of compound (A) with compound (B) in the presence of catalyst (C).

[0155] Compound (A) is in particular an organopolysiloxane containing at least two hydrogen atoms bonded to different silicon atoms in each molecule.

[0156] Compound (A) can have any molecular structure, in particular a linear-chain or branched- chain structure or a cyclic structure.

[0157] Compound (A) can have a viscosity at 25°C ranging from 1 to 50 000 centistokes, in particular in order to be readily miscible with compound (B).

[0158] The organic groups bonded to the silicon atoms of compound (A) may be alkyl groups such as methyl, ethyl, propyl, butyl, octyl; substituted alkyl groups such as 2-phenylethyl, 2- phenylpropyl or 3,3,3-trifluoropropyl; aryl groups such as phenyl, tolyl, xylyl; substituted aryl groups such as phenylethyl; and substituted monovalent hydrocarbon-based groups such as an epoxy group, a carboxylate ester group or a mercapto group.

[0159] Compound (A) can thus be chosen from trimethylsiloxy-terminated methylhydropolysiloxanes, trimethylsiloxy-terminated dimethylsiloxane / methylhydrosiloxane copolymers or cyclic dimethylsiloxane / methylhydrosiloxane copolymers.

[0160] Compound (B) is advantageously a diorganopolysiloxane having at least two lower (for example C2-C4) alkenyl groups; the lower alkenyl group can be chosen from vinyl, allyl and propenyl groups. These lower alkenyl groups can be located at any position of the organopolysiloxane molecule but are preferably located at the ends of the organopolysiloxane molecule. The organopolysiloxane (B) may have a branched-chain, linear-chain, cyclic or network structure, but the linear-chain structure is preferred. Compound (B) may have a viscosity ranging from the liquid state to the gum state. Preferably, compound (B) has a viscosity of at least 100 centistokes at 25°C.

[0161] In addition to the abovementioned alkenyl groups, the other organic groups bonded to the silicon atoms in the compound (B) can be alkyl groups, such as methyl, ethyl, propyl, butyl or octyl; substituted alkyl groups, such as 2-phenylethyl, 2-phenylpropyl or 3,3,3-trifluoropropyl; aryl groups, such as phenyl, tolyl or xylyl; substituted aryl groups, such as phenylethyl; and substituted monovalent hydrocarbon groups, such as an epoxy group, a carboxylate ester group or a mercapto group.

[0162] The organopolysiloxanes (B) may be chosen from methylvinylpolysiloxanes, methylvinylsiloxane-dimethylsiloxane copolymers, dimethylvinylsiloxy-terminated dimethylpolysiloxanes, dimethylvinylsiloxy-terminated dimethylsiloxane-methylphenylsiloxane copolymers, dimethylvinylsiloxy-terminated dimethylsiloxane-diphenylsiloxane- methylvinylsiloxane copolymers, trimethylsiloxy-terminated dimethylsiloxane- methylvinylsiloxane copolymers, trimethylsiloxy-terminated dimethylsiloxane- methylphenylsiloxane-methylvinylsiloxane copolymers, dimethylvinylsiloxy-terminated methyl(3,3,3-trifluoropropyl)polysiloxanes, and dimethylvinylsiloxy-terminated dimethylsiloxane-methyl(3,3,3-trifluoropropyl)siloxane copolymers.

[0163] In particular, the organopolysiloxane elastomer may be obtained by reaction of dimethylvinylsiloxy-terminated dimethylpolysiloxane and trimethylsiloxy-terminated methylhydropolysiloxane, in the presence of a platinum catalyst.

[0164] According to another variant, compound (B) can be an unsaturated hydrocarbon compound having at least two lower (for example C2-C4) alkenyl groups; the lower alkenyl group can be chosen from vinyl, allyl and propenyl groups. These lower alkenyl groups can be located at any position of the molecule but are preferably located at the ends. By way of example, mention may be made of hexadiene, in particular of 1 ,5-hexadiene.

[0165] Advantageously, the sum of the number of ethylenic groups per molecule of compound (B) and of the number of hydrogen atoms bonded to silicon atoms per molecule of compound (A) is at least 5.

[0166] It is advantageous for compound (A) to be added in an amount such that the molecular ratio between the total amount of hydrogen atoms bonded to silicon atoms in compound (A) and the total amount of all the ethylenically unsaturated groups in compound (B) is within the range from 1.5 / 1 to 20 / 1.

[0167] Compound (C) is the catalyst of the crosslinking reaction and is in particular chloroplatinic acid, chloroplatinic acid-olefin complexes, chloroplatinic acid-alkenylsiloxane complexes, chloroplatinic acid-diketone complexes, platinum black and platinum on a support.

[0168] Catalyst (C) is preferably added in an amount of from 0.1 to 1000 parts by weight and better still from 1 to 100 parts by weight, as clean platinum metal, per 1000 parts by weight of the total amount of compounds (A) and (B).

[0169] Use may be made, for example, as spherical non-emulsifying elastomers, of those sold under the names DC 9040®, DC 9041®, DC 9509® and DC 9505® by Dow Corning. Use may also be made of those sold under the names KSG-6®, KSG-15®, KSG-16®, KSG- 18®, KSG-41®, KSG-42®, KSG-43®, KSG-44®, by Shin Etsu; Gransil SR 5CYC® gel, Gransil SR DMF 10 gel®, Gransil SR DC556 gel®, Gransil RPS®, Gransil DMG-6® and Gransil DMG- 6® LC from Grant Industries; 1229-02-167®, 1229-02-168® and SFE 839 ® from General Electric.

[0170] According to a preferred embodiment, the composition according to the invention comprises at least one non-emulsifying organopolysiloxane elastomer in the form of a gel carried in at least one silicone oil, preferably a linear silicone oil of dimethicone type.

[0171] Mention may be made, for example, of the Polysilicone-11 / Dimethicone mixture, such as the commercial products Gransil DMG-6® and Gransil DMG-6® LC from Grant Industries.

[0172] In a preferred embodiment, the composition according to the invention comprises at least one filler chosen from fumed silica, porous silica particles of spherical shape, organopolysiloxane elastomers and mixtures thereof.

[0173] In a preferred embodiment, the composition according to the invention comprises at least two fillers, the first being chosen from fumed silica or porous silica particles of spherical shape and the second being chosen from organopolysiloxane elastomers.

[0174] Physiologically acceptable medium

[0175] Besides the compounds indicated previously, the composition according to the invention comprises a physiologically acceptable medium.

[0176] The term “physiologically acceptable medium” is understood to denote a medium which is particularly suitable for the application of a composition of the invention to keratin materials, in particular the skin.

[0177] The physiologically acceptable medium is generally suited to the nature of the support onto which the composition has to be applied, and also to the appearance under which the composition has to be packaged.

[0178] The cosmetic compositions of the invention are preferably in the form of an O / W emulsion.

[0179] The physiologically acceptable medium may comprise water and optionally one or more water- miscible solvents.

[0180] According to a preferred embodiment, the compositions of the invention comprise at least 20% by weight of water, in particular at least 40% by weight of water relative to the total weight of said composition. Preferentially, the composition according to the invention has a water content ranging from 20% to 95% by weight, even better still from 40% to 90% by weight, relative to the total weight of the composition.

[0181] A water that is suitable for the invention may be a floral water such as cornflower water and / or a mineral water such as Vittel water, Vichy water or La Roche Posay water and / or a spring water.

[0182] As solvents, mention may be made of one or more cosmetically acceptable organic solvents, which may be alcohols: in particular monovalent alcohols such as ethyl alcohol, isopropyl alcohol, benzyl alcohol and phenylethyl alcohol; diols such as ethylene glycol, propylene glycol and butylene glycol; and ethers such as ethylene glycol monomethyl, monoethyl and monobutyl ethers, propylene glycol monomethyl, monoethyl and monobutyl ethers, and butylene glycol monomethyl, monoethyl and monobutyl ethers, and glycerol.

[0183] The water-miscible organic solvent(s) can be present in a concentration of from 0.01 % to 30% by weight, preferably from 0.1% to 20% by weight and more preferably from 1 % to 15% by weight, relative to the total weight of the composition.

[0184] The composition according to the invention may also comprise any water-soluble or water- dispersible compound such as gelling agents, film-forming polymers, thickeners, surfactants, and mixtures thereof.

[0185] The composition according to the invention may also comprise at least one fatty substance such as one or more oils.

[0186] According to one embodiment, the composition may comprise from 0.1 % to 50% by weight of fatty substance, preferably of oil(s), and preferably from 0.5% to 40% of fatty substance, preferably of oil(s), by weight relative to the total weight of said composition.

[0187] The term “oil” refers to any fatty substance that is in liquid form at ambient temperature (20- 25°C) and at atmospheric pressure. These oils may be of plant, mineral or synthetic origin.

[0188] As oils that can be used in the composition of the invention, examples that may be mentioned include: hydrocarbon oils of animal origin; hydrocarbon oils of plant origin; synthetic esters and ethers, notably of fatty acids, for instance oils of formulae R1COOR2 and R1OR2 in which R1 represents the residue of a fatty acid comprising from 8 to 29 carbon atoms, and R2 represents a branched or unbranched hydrocarbon chain containing from 3 to 30 carbon atoms; linear or branched hydrocarbons, of mineral or synthetic origin; - fatty alcohols having from 8 to 26 carbon atoms;

[0189] - fluoro oils which are partially hydrocarbon-based and / or silicon-based; silicone oils; mixtures thereof.

[0190] In the list of oils mentioned above, a hydrocarbon oil means any oil mainly comprising carbon and hydrogen atoms, and possibly ester, ether, fluoro, carboxylic acid and / or alcohol groups.

[0191] According to a preferred embodiment of the invention, the composition used in the context of the invention is a water-in-oil (W / O) or oil-in-water (O / W) emulsion, preferably an oil-in-water (O / W) emulsion. The proportion of fatty substance in the emulsion may range from 5% to 90% by weight and preferably from 5% to 60% by weight relative to the total weight of the composition.

[0192] The composition may comprise at least one emulsifier. The emulsions generally contain at least one emulsifier chosen from amphoteric, anionic, cationic and non-ionic emulsifiers, used alone or as a mixture, and optionally a coemulsifier. The emulsifiers are chosen appropriately according to the emulsion to be obtained (W / O or O / W).

[0193] Among the emulsifiers, mention may be made of dimethicone copolyol, in particular bis- PEG / PPG-16 / 16 PEG / PPG-16 / 16 dimethicone, preferably a mixture of bis-PEG / PPG-16 / 16 PEG / PPG-16 / 16 dimethicone and caprylic / capric triglycerides (87 / 13), such as the product sold under the name Abil Care 85 by Evonik Goldschmidt.

[0194] The emulsifier and the coemulsifier are generally present in the composition in a proportion ranging from 0.3% to 20% by weight and preferably from 0.5% to 10% by weight relative to the total weight of the composition.

[0195] In one particular embodiment of the invention, the composition according to the present invention may also comprise at least one pH correcting agent (pH corrector).

[0196] Two or more pH correcting agents may be used in combination. Thus, a single type of pH correcting agent or a combination of different types of pH correcting agents can be used.

[0197] At least one acidifying agent and / or at least one basifying agent (alkaline agent) may be used as pH correcting agent.

[0198] The acidifying agent may be a monovalent or polyvalent acid, such as a divalent acid.

[0199] The acidifying agents may be, for example, mineral (inorganic) acids such as hydrochloric acid, sulfuric acid and phosphoric acid, or organic acids such as carboxylic acids, for example tartaric acid, citric acid and lactic acid, and also sulfonic acids.

[0200] The basifying agent may be a monovalent or polyvalent base, such as a divalent base. The basifying agents may be mineral (inorganic) or organic, or hybrid.

[0201] Mineral basifying agents can be chosen from aqueous ammonia; alkali metal carbonates or bicarbonates such as sodium or potassium carbonates and sodium or potassium bicarbonates; alkali metal hydroxides such as sodium hydroxide and potassium hydroxide; and mixtures thereof.

[0202] The organic basifying agents may be chosen from organic amines with a pKb at 25°C of less than 12, preferably less than 10 and even more advantageously less than 6. It should be noted that this is the pKb corresponding to the function of greatest basicity. In addition, the organic amines do not comprise any alkyl or alkenyl fatty chains comprising more than ten carbon atoms.

[0203] The organic basifying agent may be chosen, for example, from alkanolamines, oxyethylenated and / or oxypropylenated ethylenediamines, amino acids and amine compounds of formula (IV) below: in which

[0204] W represents a divalent Ci-Ce alkylene radical optionally substituted with one or more hydroxyl groups or a Ci-Ce alkyl radical, and optionally interrupted with one or more heteroatoms such as O and N, and

[0205] Rx, Ry, Rzand Rt, which may be identical or different, represent a hydrogen atom or a Ci-Ce alkyl, Ci-Ce hydroxyalkyl or Ci-Ce aminoalkyl radical.

[0206] Examples of amine compounds of formula (IV) which may be mentioned include 1 ,3- diaminopropane, 1 ,3-diamino-2-propanol, spermine and spermidine.

[0207] The term "alkanolamine" denotes an organic amine comprising a primary, secondary or tertiary amine function, and one or more linear or branched Ci-Cs alkyl groups bearing one or more hydroxyl radicals.

[0208] Alkanolamines such as monoalkanolamines, dialkanolamines or trialkanolamines comprising one to three identical or different C1-C4 hydroxyalkyl radicals may be suitable for the present invention. Among the compounds of this type, mention may be made of monoethanolamine (MEA), diethanolamine, triethanolamine, monoisopropanolamine, diisopropanolamine, N- dimethylaminoethanolamine, 2-amino-2-methyl-1-propanol, triisopropanolamine, 2-amino-2- methyl-1 ,3-propanediol, 3-amino-1 ,2-propanediol, 3-dimethylamino-1 ,2-propanediol and tris(hydroxymethylamino)methane.

[0209] The amino acids which can be used are of natural or synthetic origin, in their L, D or racemic form, and comprise at least one acid function chosen more particularly from carboxylic acid, sulfonic acid, phosphonic acid or phosphoric acid functions. The amino acids may be in neutral or ionic form.

[0210] As amino acids that may be used in the present invention, mention may notably be made of aspartic acid, glutamic acid, alanine, arginine, ornithine, citrulline, asparagine, carnitine, cysteine, glutamine, glycine, histidine, lysine, isoleucine, leucine, methionine, N- phenylalanine, proline, serine, taurine, threonine, tryptophan, tyrosine and valine.

[0211] It may be preferable for the amino acids to be basic amino acids comprising an additional amine function optionally included in a ring or in a ureido function.

[0212] Such basic amino acids may preferably be chosen from those corresponding to formula (V) below:

[0213] R — -CH, — CH-,,

[0214] CO,,H

[0215] £(V) in which

[0216] R represents a group selected from:

[0217] -(CH2)3-NH2,

[0218] -(CH2)2-NH2,

[0219] -(CH2)2-NH-CO-NH2, and

[0220] The compounds corresponding to formula (V) include histidine, lysine, arginine, ornithine and citrulline. The organic basifying agent may be chosen from organic amines of heterocyclic type. Besides histidine, which has already been mentioned in the amino acids, mention may be made in particular of pyridine, piperidine, imidazole, triazole, tetrazole and benzimidazole.

[0221] The organic basifying agent may also be chosen from amino acid dipeptides. As amino acid dipeptides that can be used in the present invention, mention may notably be made of carnosine, anserine and balenine.

[0222] The organic basifying agent may also be chosen from compounds comprising a guanidine function. As amines of this type which can be used in the present invention, besides arginine, which has already been mentioned as amino acid, mention may notably be made of creatine, creatinine, 1 ,1-dimethylguanidine, 1 , 1 -diethylguanidine, glycocyamine, metformin, agmatine, N-amidinoalanine, 3-guanidinopropionic acid, 4-guanidinobutyric acid and 2- ([amino(imino)methyl]amino)ethane-1 -sulfonic acid.

[0223] In a preferred embodiment of the present invention, the organic basifying agent may be selected from amino acids, preferably basic amino acids, and more preferably arginine, lysine, histidine or mixtures thereof. Even more preferentially, the organic basifying agent may be arginine.

[0224] The hybrid compounds which may be mentioned include the salts of the amines mentioned above with acids such as carbonic acid or hydrochloric acid. Guanidine carbonate or monoethanolamine hydrochloride may in particular be used.

[0225] The pH correcting agent may be present in an amount of 0.01 % by weight or more, preferably 0.05% by weight or more, and more preferably 0.1 % by weight or more, relative to the total weight of the composition.

[0226] The pH correcting agent may be present in an amount of 15% by weight or less, preferably 10% by weight or less, and more preferably 5% by weight or less, relative to the total weight of the composition.

[0227] The pH correcting agent may be present in an amount ranging from 0.01 % to 15% by weight, preferably from 0.05% to 10% by weight and more preferably from 0.1 % to 5% by weight or less, relative to the total weight of the composition.

[0228] It is preferable for the composition according to the present invention to have a pH of 4.5 or more, and more preferably of 5 or more.

[0229] It is preferable for the composition according to the present invention to have a pH of 7.0 or less, and more preferably of 6.5 or less. It is preferable for the composition according to the present invention to have a pH of from 4.5 to 6.5, and more preferably from 5.5 to 6.5.

[0230] The pH of the composition means the pH of the aqueous phase of the composition according to the present invention.

[0231] It may be preferable for at least one buffer or buffering agent to also be used, like the pH correcting agent, in combination with the acidifying agent and / or the basifying agent, in order to stabilize the pH of the composition according to the present invention.

[0232] As buffer, any of the commonly known buffers may be used. For example, salts of acids or bases, preferably salts of weak acids or weak bases, may be used. For example, sodium citrate or sodium lactate can be used as buffer, if citric acid or lactic acid is used as acidifying agent.

[0233] Additives

[0234] A cosmetic composition according to the invention may also comprise, in addition, any additive usually used in the field concerned, for example chosen from gums, resins, dispersants, polymers, antioxidants, essential oils, preserving agents, fragrances, neutralizers, antiseptics, UV-screening agents, cosmetic active agents, and mixtures thereof.

[0235] It is a matter of routine practice for a person skilled in the art to adjust the nature and amount of the additives present in the compositions in accordance with the invention such that the desired cosmetic properties and stability properties thereof are not thereby affected.

[0236] A composition used according to the invention comprises in particular at least one thiopyridinone compound of formula (I) or (I’) described above and may be in any presentation form normally used in the cosmetics field.

[0237] It may notably be in the form of an aqueous or aqueous-alcoholic solution, which is optionally gelled, a dispersion of the lotion type, which is optionally a two-phase lotion, an oil-in-water or water-in-oil or multiple emulsion, an aqueous gel, a dispersion of oils in an aqueous phase, notably by means of spherules, it being possible for these spherules to be polymer particles or, better still, lipid vesicles of ionic and / or non-ionic type, or else in the form of a powder, a serum, a paste or a flexible stick or else a stick. It can be of solid, pasty or more or less fluid liquid consistency. It may optionally be applied to the skin in aerosol form. It may also be in solid form, for example in stick form.

[0238] Thus, the composition may comprise any constituent usually employed in the envisaged topical application and administration. A composition according to the invention may advantageously be in the form of an emulsion, obtained especially by dispersing an aqueous phase in a fatty phase (W / O) or a fatty phase in an aqueous phase (O / W), of liquid or semi-liquid consistency of the milk type, or of soft, semi-solid or solid consistency of the cream or gel type, or alternatively a multiple emulsion (W / O / W or O / W / O). These compositions are prepared according to the usual methods.

[0239] Said thiopyridinone compound(s) of formula (I) or (I’), or said composition containing them, are used topically in the context of a use or a process according to the invention.

[0240] The compositions according to the invention may be applied directly to the skin or, alternatively, to cosmetic supports of occlusive or non-occlusive type, intended to be applied locally to the skin. As non-limiting examples of cosmetic supports, mention may be made notably of a patch, a wipe, a roll-on and a pen.

[0241] The composition may optionally be rinsed off after having been applied to the skin.

[0242] Applications

[0243] The cosmetic compositions covered by the invention may be face care or body care products.

[0244] The compositions according to the invention are cosmetic compositions intended for skin care.

[0245] These compositions are therefore intended to be applied to the skin.

[0246] According to another of its subjects, the present invention also relates to a non-therapeutic cosmetic treatment process for caring for keratin materials, in particular for depigmenting, lightening and / or bleaching keratin materials, comprising a step of applying a composition, preferably a cosmetic composition, as described above, to keratin materials, preferably the skin.

[0247] Another subject of the present invention is the non-therapeutic cosmetic use of a composition, preferably a cosmetic composition, as described above for caring for keratin materials, in particular for bleaching, lightening and / or depigmenting keratin materials.

[0248] A cosmetic use of the invention thus only addresses aesthetic defects of the skin, and therefore does not exert any therapeutic effect.

[0249] The present invention relates to a non-therapeutic cosmetic skin care use of at least one thiopyridinone compound of formula (I) or (I’), or of a composition, in particular a cosmetic composition, comprising said thiopyridinone compound(s).

[0250] The term "care" means non-therapeutic care capable of producing an aesthetic effect without, however, preventing or correcting a pathological dysfunction of the skin.

[0251] Throughout the application, the wording "comprising one" or "containing one" means "comprising at least one" or "containing at least one", unless otherwise specified. Throughout the above description, unless otherwise mentioned, the term "between x and y" or "ranging from x to y" corresponds to an inclusive range, that is to say that the values x and y are included in the range.

[0252] In addition, the expression "at least one" should be understood as being synonymous with "one or more", unless otherwise specified.

[0253] The invention will be illustrated in the non-limiting examples that follow. Unless otherwise stated, the % are expressed by weight relative to the total weight of the composition.

[0254] The compositions are prepared according to the usual methods of formulating cosmetic compositions.

[0255] The examples that follow are presented as non-limiting illustrations of the invention. The compounds are, depending on the case, cited as the chemical names or as the CTFA (International Cosmetic Ingredient Dictionary and Handbook) names.

[0256] The invention is illustrated in greater detail in the examples that follow.

[0257] Example

[0258] Example - Evaluation of the stability of a composition according to the invention

[0259] A - Stability after 2 months at 37°C and 45°C

[0260] The compositions presented in Table 7 were prepared according to the standard methods of a person skilled in the art.

[0261] The raw materials are mentioned in % by weight.

[0262] Table 7 a.m. means active material.

[0263] The compositions (C1 according to the invention and comparative compositions CC1 , CC2 and CC3 outside the invention) above are manufactured, packaged in 100 ml bottles or jars and incubated in incubators (Firlabo brand, BioConcept BC120 model) having different temperatures (45°C and 37°C) for 2 months in order to predict their stability after 3 years at room temperature. The appearance of the formulations is observed after returning to room temperature.

[0264] The results are presented in Table 8 below: Table 8

[0265] Conclusion: No agglomerate of Polysilicone 11 used in the composition as filler is observed in the case of composition C1 according to the invention containing a poloxamer following incubation at 45°C and 37°C for 2 months, unlike what is observed for the comparative compositions outside the invention CC1 , CC2, and CC3.

[0266] B - Stability after centrifugation

[0267] The compositions presented in Table 9 were prepared according to the standard methods of a person skilled in the art.

[0268] Table 9 a.m. means active material.

[0269] The test consists in verifying the conformity of the compositions C2 according to the invention and CC4 and CC5 outside the invention after centrifugation (Firlabo brand, SW9 model) of a sample of these compositions, under conditions allowing accelerated ageing to be simulated. The observation is made at the conical bottom of the tube and at the surface (evaluation of the rise or flocculation of the fillers and evaluation of the sedimentation of the fillers).

[0270] The standard centrifugation conditions used are:

[0271] - speed: RCF 900 g

[0272] - time 60 min - temperature 25°C

[0273] - 15 ml graduated tubes with conical bottom

[0274] The results are presented in Table 10 below:

[0275] Table 10 Conclusion: Composition C2 according to the invention and comparative composition CC5 outside the invention (not containing the active agent N-[(2-thioxo-1 ,2-dihydropyridin-3- yl)carbonyl]glycine) exhibit the same stability profiles, namely a very low sedimentation of silica and a very low rise of Polysilicone 11 unlike composition CC4 without poloxamer. Thus, the introduction of N-[(2-thioxo-1 ,2-dihydropyridin-3-yl)carbonyl]glycine induces problems of sedimentation or flocculation of the fillers present in composition C2 according to the invention to a lesser extent in the presence of poloxamer compared with composition CC4 outside the invention without poloxamer. The addition of poloxamer thus makes it possible to stabilize compositions comprising N-[(2-thioxo-1 ,2-dihydropyridin-3-yl)carbonyl]glycine and fillers in a gelled system.

Claims

Claims

1. Composition, preferably a cosmetic composition, comprising: at least one compound selected from the compounds of formula (I), tautomers of formula (I’), salts thereof, solvates thereof, such as hydrates thereof, optical isomers thereof, racemates thereof, and mixtures thereof:in which,- Ri denotes a radical selected from a) a hydrogen atom, and b) a saturated, linear C1-C10 or branched C3-C10 alkyl group optionally substituted with one or more groups, which may be identical or different, selected from i) -O-R3, and ii) -S-R3, and- R2 denotes a radical selected from a) a hydrogen atom, b) a saturated, linear C1-C12 or branched C3-C12 or cyclic C3-C8 hydrocarbon group optionally substituted with one or more groups, which may be identical or different, selected from i) -O-R3, ii) -S-R3, iii) -C(O)-O-R3, and iv) a C5-C12 aryl group, optionally substituted with one or more hydroxyls and / or with one or more C1- Cs alkoxy radicals, and c) a C5-C12 aryl group, optionally substituted with one or more hydroxyls and / or with one or more Ci-Cs alkoxy radicals, and- R3 denotes a radical selected from a) a hydrogen atom, and b) a saturated, linear C1-C10 or branched C3-C10 alkyl group; at least one hydrophilic gelling agent; at least one polypropylene oxide)-poly(ethylene oxide) block polymer; at least one filler.

2. Composition according to Claim 1 , wherein R1 of formulae (I) and (I’) represents a hydrogen atom; a linear (C1-C10) alkyl group or a branched (C3-C10) alkyl group, inparticular a linear (Ci-Ce) alkyl group or a branched (Ca-Ce) alkyl group, such as methyl, ethyl, n-pentyl, n-nonyl, isobutyl, more preferably ethyl; in particular said alkyl group of R1 is not substituted.

3. Composition according to Claim 1 or 2, wherein R2 of formulae (I) and (I’) represents a hydrogen atom; a linear (C1-C10) or branched (C3-C10) alkyl group, in particular a linear (Ci-Ce) or branched (Ca-Ce) alkyl group, such as methyl, ethyl, n- pentyl, n-nonyl, isobutyl, more preferably methyl or ethyl; said alkyl group of R2 not being substituted.

4. Composition according to any one of Claims 1 to 3, wherein R3 of formulae (I) and (I’) represents a hydrogen atom; a saturated, linear C1-C10 or branched C3-C10 alkyl group; in particular a linear (Ci-Ce) alkyl group or a branched (Ca-Ce) alkyl group, preferably a (C1-C4) alkyl group such as the methyl group.

5. Composition according to any one of Claims 1 to 4, wherein R2of formulae (I) and (I’) represents a linear (C1-C10) alkyl group or a branched (C3-C10) alkyl group, in particular a linear (Ci-Ce) alkyl group or a branched (Ca-Ce) alkyl group, such as methyl, ethyl, n-pentyl, n-nonyl, isobutyl, more preferably methyl or ethyl; said alkyl group being substituted with one or more groups selected from i), ii), iii) and iv) as defined according to Claim 1 , preferably said alkyl group being substituted with one or two groups selected from i), ii) and iii), more preferably with one or two groups selected from i) and iii), better still substituted with a group iii) such as carboxy.

6. Composition according to any one of Claims 1 to 5, wherein R2 of formulae (I) and (I’) represents a (Ca-Cs) cycloalkyl group, preferably a (C5-C7) cycloalkyl group such as cyclohexyl; a C5-C12 aryl group optionally substituted with one or more hydroxyls and / or with one or more Ci-Cs alkoxy radicals, preferably a phenyl group, in particular not being substituted.

7. Composition according to any one of Claims 1 to 6, wherein R3 of formulae (I) and (I’) represents a hydrogen atom; a saturated, linear C1-C10 or branched C3-C10 alkyl group; in particular a linear (Ci-Ce) alkyl group or a branched (Ca-Ce) alkyl group, preferably a (C1-C4) alkyl group such as a methyl group.

8. Composition according to any one of Claims 1 to 7, wherein:- R1 of formulae (I) and (I’) represents a radical selected from a) a hydrogen atom, and b) a saturated, linear Ci-Ce or branched C3-C6 alkyl group optionally substituted with one or more groups, which may be identical or different, selected from i) -O-R3, and ii) -S-R3, preferably optionally substituted with one or more groups i);- R2 of formulae (I) and (I’) represents a radical selected from a) a hydrogen atom, and b) a saturated, linear C1-C10 or branched C3-C10 or cyclic C3-C8, for instance Cs-Ce, hydrocarbon group optionally substituted with one or more groups, which may be identical or different, selected from i) -O-R3, ii) -S-R3, iii) -C(O)-O-R3, and iv) a phenyl group, optionally substituted with one or more hydroxyls and / or with one or more C1-C4 alkoxy radicals such as methoxy, preferably substituted with one or more groups selected from i) and iii), preferably iii) such as carboxy; and- R3 of formulae (I) and (I’) represents a radical selected from a) a hydrogen atom, and b) a saturated, linear Ci-Ce or branched C3-C6 alkyl group.

9. Composition according to any one of Claims 1 to 8, wherein:- R1 of formulae (I) and (I’) represents a radical selected from a) a hydrogen atom, and b) a saturated, linear C1-C4 or branched C3-C4 alkyl group optionally substituted with one or more groups, which may be identical or different, selected from i) -OR3, more preferably not being substituted;- R2of formulae (I) and (I’) represents a radical selected from a) a hydrogen atom, and b) a saturated, linear C1-C10 or branched C3-C10 or cyclic C3-C8, for instance Cs-Ce, hydrocarbon group optionally substituted with one or more groups, which may be identical or different, selected from i) -O-R3, iii) -C(O)-O-R3, and iv) a C5-C12 aryl group, optionally substituted with one or more hydroxyls and / or with one or more C1-C4 alkoxy radicals; and- R3 of formulae (I) and (I’) represents a radical selected from a) a hydrogen atom, and b) a saturated, linear C1-C4 or branched C3-C4 alkyl group, such as methyl or ethyl.

10. Composition according to any one of Claims 1 to 9, wherein the compound of formula (I) is selected from compounds 1 to 24 below, tautomers thereof, salts thereof, solvates thereof, such as hydrates thereof, optical isomers thereof, racemates thereof, and mixtures thereof, preferably compounds 1 , 2, 4, 6, 7, 9, 11 , 12, 14, 15, 16, 17, 18, 19, 20 or 21 , more preferentially 1 , 9, 16, 18, 19, 20 or 21 , even more preferentially 18, 19, 20 or 21 , and even better still 20:

11. Composition according to any one of Claims 1 to 10, wherein said compound of formula (I) or (I’) is present in the composition in an amount ranging from 0.01 % to 10% by weight, preferably from 0.05% to 5% by weight, more preferably from 0.1 % to 3% by weight, relative to the total weight of the composition.

12. Composition according to any one of Claims 1 to 11 , wherein the hydrophilic gelling agent is selected from polymers bearing a sulfonic group, polysaccharides, and mixtures thereof.

13. Composition according to Claim 12, wherein the polymer bearing a sulfonic group is selected from homopolymers and copolymers of 2-acrylamido-2- methylpropanesulfonic acid, salts thereof and mixtures thereof, preferably the polymer bearing a sulfonic group is selected from homopolymers of 2-acrylamido-2- methylpropanesulfonic acid, salts thereof and mixtures thereof.

14. Composition according to Claim 12 or 13, wherein the polysaccharide is xanthan gum.

15. Composition according to any one of Claims 1 to 14, wherein said gelling agent is present in the composition in a content ranging from 0.01 % to 5% relative to the total weight of the composition, and preferably from 0.1% to 3%, and even more preferentially from 0.1 % to 1 % by weight of hydrophilic gelling agent relative to the total weight of the composition.

16. Composition according to any one of Claims 1 to 15, wherein said polypropylene oxide)-poly(ethylene oxide) block polymer is selected from polyethylene glycol / polypropylene glycol / polyethylene glycol triblock polymers having the following chemical structure: H-(O-CH2-CH2)a-(O-CH(CH3)-CH2)b-(O-CH2-CH2)a-OH, wherein: a ranges from 2 to 150, and b ranges from 1 to 100; preferably a ranges from 10 to 130, and b ranges from 20 to 80.

17. Composition according to any one of Claims 1 to 16, wherein said polypropylene oxide)-polypthylene oxide) block polymer is present in the composition in a content ranging from 0.05% to 2% by weight relative to the total weight of thecomposition, and preferably from 0.1% to 1% by weight, and even more preferentially from 0.2% to 0.9% by weight relative to the total weight of the composition.

18. Composition according to any one of Claims 1 to 17, wherein said filler is selected from fumed silica, porous silica particles of spherical shape, organopolysiloxane elastomers and mixtures thereof.

19. Composition according to any one of Claims 1 to 18, wherein said filler is present in a content ranging from 0.1% to 20% by weight relative to the total weight of the composition, and preferably ranging from 1% to 10% by weight, and even more preferentially ranging from 2% to 5% by weight relative to the total weight of the composition.

20. Non-therapeutic cosmetic treatment process for caring for keratin materials, in particular for depigmenting, lightening and / or bleaching keratin materials, comprising a step of applying a composition, preferably a cosmetic composition, as defined in any one of Claims 1 to 19, to keratin materials, preferably the skin.

21. Non-therapeutic cosmetic use of a composition, preferably a cosmetic composition, as defined in any one of Claims 1 to 19, for caring for keratin materials, in particular for bleaching, lightening and / or depigmenting keratin materials.

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